AAron Corporation BS-310S Instruction Manual
rry1qlicntionArFtoN
lSMHz
Application/A[RON
Dua!
oscilloscope
is
equivalent
TTM
AARON
2-2,
Nishikicho,
Chiyoda-ku,
Trace
0scilloscope
BS-3{
to
Model
CORPORATION
Kanda
Tokyo,
3O3
101
OS
Phone:
Telex:
29I-1997
222-2341
TTMTYO
TABLE
OF CONTENTS
SECTION
SECTION
SECTION
SECTION 4 CIRCUIT DESCRIPTION
,34
I
INTRODUCTION
2
SPECIFICATIONS
3
OPERATIONS
3-l
3-2
J-J
3-5
34
3-7
3-8
3-9
3-10
3-l I
3-12
INITIAL
INTERNAL BATTERY
EXTERNAL
CONTROI.S AND INDICATIONS.
INTERNAL SWEEP AND TRIGGERING
X-Y
CALIBRATED VOLTAGE MEASUREMENTS
DUAL TRACE WAVEFORM
TV SIGNAL SYNCHRONIZATION.
ADD
BATTERY CHARGING.
APPLICATIONS
OPERATION
DC OPERATION
OPERATION.
MEASUREMENTS
SUB
&
4-1 OU"ILINESOFCIRCUIT
4-2
4-3
44
44<l) Battery Charging Circuit
44<2) Switching
.
SECTION 5
44<3) Dc-DcConverterCircuit
44-(4)
4-4-(5)
5-I
5-1-(l) Preventive Maintenance
5-1-(2)
5-l
5.2
5-2-(l) Power
5-2-(2) Vertical Amplifier Unit Adjustments
5-2<3) Horizontal/Time Base Unit Adjustments . .
VERTICAL AMPLIFIER
HORIZONTAL/TIMEBASECIRCUIT..
POWER SLIPPLY
Regulator
High
Voltage Section for CRT and Unblanking Circuit
BLOCK
MAINTENANCE AND ADJUSTMENTS
GENERAL
Cleaning
-(3)
Recalibration
ADJUSTMENTS
DIAGRAM
Supply
CIRCUIT
AND CALIBRATION
Unit
(AC
Power
OPERATION
OBSERVATION
CIRCUIT
Circuit
Adjustments
Line).
. .
.....hgEI
3
3
1
1
7
7
7
7
7
8
8
t
.......
13
13
.......t4
t{
l.f
.....--
.
.
t.f
15
15
t5
l6
t6
I6
l5
l5
rt
n
SECTION
SECTION
PARTS LIST
6
6-I CHASSIS.
6.2 VERTICAL
6.3
64
HORIZONTAL/TIME
POWER
AMPLIFIER UNIT. .
SUPPLY
UNIT.
7 SERVICING
7-I CIRCUIT
7-l-(l) Components
7.2 CIRCUIT
-2-(l)
7
Components
DIAGRAM
Location Diagram
DIAGRAM
Location
7.3 CIRCUIT DIAGRAM
-3-(l)
7
Components
l,ocation
BASE UNIT
FOR VERTICAL
FOR HORIZONTAL/TIME
Diagram
FOR POWER
Diagram
AMPLIFIER
SIJPPLY
I.]NIT.
I.]NIT
BASE
IJNIT .
2t
23
24
26
28
D
30
3l
32
l_r
SECTION
I
INTRODUCTION
The
Weight
This
TV
which provide
The
maintenance
control
BS-3t0Sisadual
Model
only
4.5kgs. and 1
BS-310S
line or frame
portability
equipment, Test equipment
trace,battery-operated,
x 2B(fD x
l3(H)
offers
2
applications;
2m
V/DIV
display.
hours continuous operation.
performance
and
sensitivity, automatic selection of
It
further
compatibility realized
for example Telecommunication
on cars,
,I
provides
l5MHzPortableOscilloscopeof
298(D)
mm
in
the
choice of DC, Battery
by
trains,
etc.
rectangular CRTwith
size, it is an ideal oscilloscope
chopped or alternate mode,
or AC
line operation.
BS-310S
the
equipment, Computers,
make it most attractive
Marine
for the field
plus
Internal
Airborne system,
and
internal
service.
automatic
rechargeable batteries
for use in
graticule.
selection of
"ON-SITE"
Industrial
,I'
rry
*
!
-1-
SECTION 2
VERTICAL DEFLECTION
Deflection Factor
2mV to
Bandwidth DC:
AC:
10V
DC to
l0Hz
to
Risetime 24nw,
Overshot Less than
lnput Impedance
Operating Modes CH-A, CH-B,
Chop
Frequency 200KHz approx.
Channel Separation
CH-B
Polality
TIMB BASE
Type
Sweep
Time 0.5p sec to
lMp
Better
CH-B
Automatic
Magnifier x5 at all
Linearity Less
TRICCERING
Sensitivity INT:
EXT:
Source
Slope
Range
TV Sync
INT,
Positive
20Hz to
Vertical and
be synchronized
TV-H(Line)andTV-V
TV-V: 0.5sec
TV-H:
3%
shunted
60dB
than
can be inverted
and
0.5sec/ DIV
ranges
than 3%
I
DIY or
I
Vp-p
CH-A, CH-B'
and Negative,
l5MHz
Horizontal Sync
50,12 sec/
DIY on
/
l5MHz(-3dB)
l5MHz(-3dB)
dy
12 ranges
20pE+3pF
DUAL, ADD and CHOP
at lkHz.
triggered.
more
and expanded for
DIY to 0.lmsec/ DIV.
/
DIV to 0.5p
In automatic mode, sweep is
19 ranges in l-2-5 step
on
or EXT
continuously
separator
(Frame)sync
are switched
sec/
in
variable
viewing.
DIV.
step with
l-2-5
level: Pull for AUTO
circuitry allows any
automatically by SWEEP
hne control.
obtained
with
without input signal.
fine control and X-Y.
portionof
SPECIFICATIONS
complex
TVvideo waveform to
TIME
DIV switch.
/
HORIZONTAL DBFLECTION
Dellection Factor 2mVto
Frequency
Input Impedance lMg shunted by
Max Input
X-Y
Response
Voltage
Operation
DC to
300V DC+AC
X-Y
CH-A:
CH-B:
OTHER
SPECIFICATIONS
CRT 95mm
Calibration Voltage
Power Requirements
0.5Yp-pr+ 5%,
AC: 90-
l0Y/
OIV on
lMHz
mode is selected by SWEEP TI]I{E
Y axis
X axis
tube(approx.
lKHz
l30Y
DC:11-30Y;7.2Y4
Weight
Battery:
Charging
4.5kgs(5.5kgs including
I 13(H) x 223(W)
Ni-Cad
Time:
l6hours (While
12 ranges
20pF+3pF
peak
or 600Vp-P
l.5KY)
Squre Wave.
180-260V;
or
Battery(up
6hours(Scope
battery)
x 298(D)mm
in
l-2-5
48-440H2
2 hour
to
not operated)
Scope operated)
-2-
step with fine control.
DIV switch
/
operation)
SECTION 3
INITIAL
3-I
OPERATION
OPERATION
Inspect
inspect
the
the instrument itself.
carton
for
serious
INITIAL AC OPERATION
Prior
1.
2.
3.
4. Adjust
5. Readjust Vertical
to any kind of
a) Set the
b) Turn
Turn INTENSITY
c)
Push
d)
PuIl
e)
The rest
0
g)
Check
Connect the AC
POWER
all the three
PULL
the
TRIGGERING LEVEL
of the controls
the line
outlet. Then the
Ni-Cd
battery.
POWER
Turn
INTENSITY
FOCUS
(Power
to ON. After approximately
clockwise
and
operation
5X MAG
voltage.
line cable into
LED
INTENSITY
and
damage which might
If damage
of the instrument,
to OFF.
switch
POSITION
control
controls
to mid-position.
control
control
remain at any
the
BATTERY
source; AC
till trace lines
controls
Horizontal
POSITION
have
the agent
for
notify
to
mid-position.
normal.
proceed
is noted,
for AUTO.
position.
AC receptacle
CHARGE indicator
(or
EXT
are easily observed.
position)
DC)
20 seconds, trace lines appear on
for
clear trace lines.
controls
the failure of the
caused
you
follolvs to
as
on the rear
is lit up in
for
locations
instrument
bought from
get
panel
red, which means
required.
before making any operation.
familiarized with
of the instrument, and
CRT
transportation.
during
the
instrument.
plug
that the set is charging
If
trace lines
screen.
no
an
into
the
appear, rotate
AC
internal
And
power
Connect
6.
Rotate CH-A Vertical
7.
wise to detent. Turn TRIGGERING
8. Readjust INTENSITY, FOCUS for
RemoveprobetipfromCAL0.5Vp-poutput.Now,theoscilloscopeisreadyforobservationofwaveforms.
9.
probe (10:1)
a
INPUT of CH-A and hook the tip of the
to
attenuator
VOLTS/DIV
SOURCE to CH-A.
clearer
switch to l0mV/DIV
display.
Then
probe
and
a
square-wave
to CAL
turn the
of
0.5Vp-p
output.
VARIABLE on the same
5 divisions is
3.2 INTERNAL BATTERY OPERATION
It
1.
required to
is
ment
is not in
battery.
2.
RECHARGING
Connect
gins
whether POWER switch
ON,
color
(or
EXT DC)position)
use. Whereas, while the instrument is in use,
the AC
takes
l6
it
lrom red to
charge
power
hours
green.
up
internal
cable to
for full
Then
battery
AC outlet
is ON or
recovery.
automatically trickle
to lull before
and to
OFF. When it is turned
Whenever the
operation.
the recharging
It takes only 6
AC receptacle of the
to OFF,
battery is charged,
charging starts
to
takes
oscilloscope.
recharging
BATTERY
maintain the
hours to
hours
16
Then
lull charged
recharge while
to reach the
recharging
requires
CHARGE
3. OPERATION
Turn
tion.
POWER
SOURCE
slide switch
found
on rear
panel
BATTERY
to
(INT),
and operate
the same
displayed on
full
automatically
hours,
6
only
indicator
level.(Power
way as AC opera-
axis
clock-
the
screen.
the
instru-
of the
level
andwhen
changes
source;
he-
its
AC
-3-
SECTION 3 OPERATION
EXTERNAL
3.3
Make
sure
type of I lV up
in-between
34
CONTROLS
I.
VERTICAL
Vertical input
2,
AC.GND.
Vertical input couplingfor
position,
rectly
connected
3.
MODE
DC OPERATION
EXT
the
to 30V,
would
not ill-effect
& INDICATIONS
INPUT
terminal
DC
the input
DC
to the
CH-A: Waveforms
CH-B:
DUAL:
ADD
CHOP:
4.
VOLTS
5. VOLTS
Vertical attenuator
Calibrated voltage
to
6. VERTICAL
Vertical
7.
HORIZONTAL
Horizontal
8. SWEEP
Horizontal
operation is
Change
9.
SWEEP TIME
IO.
EXT.
Waveforms of CH-B are displayed
In
range from 0.5sec/ DIV
the
In
range from 0.5msec
the
: CH-A and
This is chop
DrV VARTABLE
/
DrV
/
input'voltage
the
POSITION
position
position
TrME
/
sweeptime selector. It selects sweeptimes
possible
over between CHOPand
/
TRIG
Input for external
1I.
CAL
Calibration voltage
12. BATTERY
Indicates
When
I3.
TRIGGERING
LEVEL control
CHARGE
the charging and charged.
battery is chaged enough for
adjusts
PULL AUTO
pulling
By
signal
With
is set in free-running
LEVEL knob
is applied, with
trigger signal, triggered-sweep
INPUT
receptacle
withstanding
the
operation of
is correctly wired to
the
current
drain
the
for CH-A.
CH-A. In AC
terminal
of CH-A
opens and
amplifier and all components
are
displayed.
/
CH-B signals are
mode all
cinly
for CH-A. The scale is
is indicated when VAR,IABLE
used. Selectableinl2 calibratedranges
adjDster for
POSITION
adj uster.
DrV
by
DrV
triggering signal.
terminal. Calibration voltage
LEVEL
state.
CH-A.
turning the
knob
ALTERNATEis
VARIABLE
use this lamp
phase
sync
toward
line displayed on CRT.
trace
to
you,
is effectedwhere
position,
input
the
up
to
DIV up
added.
throughthe
graduated
fully clockwise
determine
auto-sweep
of internal amplifier is
lmsec
to 0.5p sec
sweepranges.
is
changes from red
the starting
polarities (+
its
of 7 .2YA.
instrument.
the DC componetof input signal is blocked
of input signal are
DlY, both channels
/
in voltage
is turned fullyclockwise.
The
The
DIV, both
/
per
wide
EXT
"DIV"
from 2mY
of 0.5p sec/ DIV
CH-B.
to
also accomplished
0.5Vp-p of about lKHz
is
effected;
sync
level is
automatically by
green.
to
point
of sw@p on the slope
the sweep is
adjustable. Whensync level
&
-).
voltage variation
DC
source
grounded.
displayed.
are
channels are
CRT
of
Set this cnotrol for
DIY
to
/
to0.5sec
/
square wave.
set in free-running
DC external
The
will not charge
position,
In DC
chopped at about
switched alternately..
screen
10V
DlV.
/
DIY in 19 calibratedsteps.
this selector in DUAL
of
be any
could
source
range means the fluctuations
the internal battery.
the
area.
proper
by capacitor.
input
l00KHz.
waveform according
InGND
terminal is di-
X-Y
MQDE.
displayed
waveform.
state even when
deviated,
is
no input
sweep
the
I
SECTION 3
OPERATION
14.
POWER ON LAMP
I5.
SYNC
Sync
sweep is started
I6.
SOURCE
Sync source
polarity
selector.
signal selector switch;
At
with negative slope.
INT : Mixed signal of
:
CH-A
CH-B
EXT
11.
GROUNDED
18
POWER SWITCH
Turns
ed off.
FOCUS
19.
Focus control to obtain
INTENSITY
20
Adjust the brightness ol waveform
TRACE ROTATOR
21.
The earth magnetics effect the
22
PULL INVERT
When
CH-A vertical input
:
CH-B vertical input signal
:
The signal applied to
TERMINAL
power
on or off.
optimum
pulled,
CH-B
is inverted,
" position
"
the
t
and CH-B
CH-A
signal is used
EXT TRIG is used
power
AC
waveform
for easy
trace
and
FRONT
VIEW
of rhe switch. sweep
becomes
is used
connected,normal chargingBwhile
line
display.
line Rotate this
accomodates ADD ro SUB
this
as sync
as sync
viewtng.
sync source
signal.
signal
as
sync signal
with a screw driver
is started with
switch is
this
proper
for
mode.
positive
trace
the
"
at
slope;
onandquickchargingwhenturn-
line
position,
"
the
-5-
SECTION
3
OPERATION
.!.)
voLTS
Same
VOLTS
Same
25
VERTICAL INPUT
Same
26
AC-GND-DC
Same
POWER
AC(or EXT
BATTERY(INT):
AC POWER
28
90V-130V
29, EXT
With use of
is inserted,
same
BATTERY COMPARTMENT
30.
Remove
olf the
DrV
/
as
for CH-B
5.
DIV
/
4. lor CH-B
as
1. for CH-B
as
2. for CH-B
as
SOURCE
AC or
DC
Priority
level.
right-side rwo
the
connector
VARIABLE
DC):
Internal
LINE
EXT
ol
AC operation
battery
RECEPTACLE
l80V-260V
AC,
DC INPUT
given
is
battery
to
legs on
before taking
DC operationfrom
and
operation.
40Hz to440Hz
receptacle,
DC
EXT
panel
rear
out
REAR
connect
source even
battery.
llv
and take
Installation
VIEW
1lV
to30V
DC source
30V
to
other sources
off the
four screws
battery should
of
DC
for operation.
are connected.
for
opening
be done
Power
BATT
vice versa.
Whenthe
consumptionis
External
COMPARTMENT.
plug
DC
maintainedthe
Pull
-6-
SECTION 3
OPERATION
INTERNAL
3.5
TRIGGERING
L
PULLAUTO
In
2.
3. Set
4.
5.. For
the
the
trace at
of TRIGGERING LEVEL
SYNC
display waveform or
waveform.
Most waveforms can
triggering
normal
a waveform
S}ryEEP
provides
presence
which
switch
source
operation the magnifing switch,
desired,
is
by a factor of 5.
Set
6.
NOTE']
TIME/DIV
sweep
USING THE 5X MAG
WHICH CAUSES LESS
X-Y
3-6
For
to CH-B.
OPERATION
some special cases,
Then
all CH-B
TRIGGERING
AND
LEVEL knob
automatic
of
input signal
triggering
sweep
control
NORM(+)
to
(-)
to the
be observed
is required,
this instrument is specially
functions work
turn to
pull
5X
and VARIABLE
switch
POSITION, THE
either
selects
recurrent sweep
for triggering, no
occurs is selected
is to obtain a stable
position
position
by using
EXT
MAG
ELECTRON TO
as horizontal
AUTO lor automatic recurrent sweep
found
is
of
in the absence
difference
by adjusting
waveform display.
the
if
if the sweep is to
INT,
apply the triggering signal
and
5X MAG
out.
switch
control
is to be triggered
sweep
be triggered
CH-A, CH-B
pushed-in to operate without
is
That will
expand
for the desired number
as internal
TRACE LINE BECOMES
EMIT
LIGHT
designed for easy
amplifier,
FROM THE
X-Y application.
whereas
for triggering.
signal
input
between
AUTO and normal
TRIGGERING
point
a
at
point
at a
TRIGGERING
EXT
to
the
CH-A
and waveform
sweep
of
DIMMER
PHOSPHOR LAYER ON
remains as
or nonnal
LEVEL control.
positive
the
on
the negative
on
SOURCE.
TRIG input.
magnification.
wave
cycles
BECAUSE
Simply
turn SWEEP
vertical
triggering sweep
modes.
The
The main
goingportion
going portion
When an external
If magnification
to be observed
displayed.
to be
OF INCREASED
THE
TIME/DIV
amplifier.
operation.
point
on
purpose
of the
of the
horizontally
SWEEP
FACE.
CRT
switch
of
3-7 CALIBRATED
Peak
voltages,
this
using
inputs.
1. Set
proper
For DC or
2.
reference level. Set
wards; a negative
tion
INoTE-l
3-8 DUAL
MODE
peak-to-peak
instrument
Proceed
as
VARIABLE
to be observed.
size
complex signals, set
(by
division) by
WHEN A
MEASURED.
TRACE WAVEFORM
to be
switch
VOLTAGE
as a voltmeter.
follows;
control
voltage
PROBE
turned to
MEASUREMENTS
voltages,
fully
Vertical
the
switch
will deflect the
the
setting
(r0:l)
DUAL. Other
Voltages can
clockwise
to DC and observe
of the
rS
OBSERVATION
3.9 TV SIGNAL SYNCHRONIZATION
Set TRIGGERINC
and line
signal.
TV frame
SYNC to TV
and line
(+
or
waveform
DC voltages and
POSITION
the input switch
voltages
be measured
position,
CAL
to
controls may be
to
the amount of
trace downward. To calculate
VOLTS/DIV
USED, THE WAVEFORM DTSPLAY
procedures
then
-),
specially
easily obtained by simply
are
switch.
are
designed circuitry
GND,
the
in
a
of
specific
whenever
then
turned
adjust
and
same
waveforms are observed
set
deflection.
manners
portion
of
a
contplex
VOLTS/DIV control
to
obtain
the vertical
the voltage
IS
ONLY
as mentioned
provides
SWEEP
tuning
division
positive
A
easy
reference.
POSITION
reading, multiply
ri 10 OF
triggering
TIME/DIV
waveform can
using either
display
to
control
voltage
will deflect
the
THE ACTUAL
above.
lor
complexed
control.
be measured
or CH-B
CH-A
the waveform in
to a
convenient
trace up-
vertical deflec-
VOLTACE
frame
TV
-7 -
SECTION
3-10
ADD & SUB MEASI.REMENTS
Sinply
Withthis
Polarity
}11
3
turn MODE switch to
MODE
at
ADD
of CH-B.
BATTERY CHARGING
ADD, added waveform
position,
subtracted waveform is
ol CH-A
and CH-B is displayed.
pulling
obtained
by
OPERATION
PULL INVERT knob whichinvertsthe
The
Charging circuit in the
The
internal
l When the
TERY
matically
If
2.
this
3. Whenever
NoTEI
3-12 APPLICATIONS
This
various effective measurements
[srNclp-rn
Either
charging circuit
instrument is switched
CHARGE
changed
the instrument
takes 6 hours.
case
the internal battery
EXTERNAL
THE
is a dual trace
Channel
controls:
Set
A
indicator changes
to trickle
is switched
oscilloscope
ACE APPLICATIoNS]
Channel
or
AC.GND.DC.
MODE
SYNC
SOURCE
PROBE
power
supply section operates
works in two
to maintain the full
off,
is charged up
DC SOURCE
feasible.
are
B
ways.
the
on,
which has full
canbe usedfor single-trace operation.
normal charge circuit charges
from red to
the
internal
WILL
green
charged level.
quick
to full,
charging changes
NOT
CHARGE THE INTERNAL BATTERY.
capability of
AC
CH-A
NORM+
INT or
to CH-A
(l
from either 90V to 130V or 180V
the battery with l/10C.
when the
charge charges
battery
Recharge
is
requires l6
the
battery
fully
charged,
with approx. ll4C and
to trickle from either
mode.
single trace
Channel
CH-A
Thanks
Ais referredtohereunder
INPUT Jack
: l)
to 260V
The
and normal charging is
hours.
quick or normal charge.
the dualtrace functions,
to
normalACpower.
frontpanelBAT-
auto-
lull recharge in
for
Connect the
chassis or the
tip
ground part.
@\UrIION!!T]
of the
probe
THE
EXCEED 600
poi
nt
the
to
PEAK-TO-PEAK
VOLTS.
in
circuit where the wave
the
form is
VOLTAGE AT THE POINT OF
-8-
measured, and
be
to
MEASUREMENT
ground
its
SHOULD
clip
NOT
to the
SECTION
3
OPERATION
3.I2.( I)AC
When
measuring
their calibrated
@at
(EX)
The
(a)
Peak voltage
(b)
p-p
voltage
(c)
Effective
(d)
Fre4uency (Hz)
Therefore,
VOLTAGE
voltage
detent
signal displayed
\
or,,
l--
.
.
voltage.
.
the Fig I
:
is
AND FREQI.,IENCY
and frequency,
points (clockwise).
on the
set VOLTS
CRT is : Fig. I
--]
2Y
DIV x2
/
2Y
DIY
/
Peak voltage
I
**
DIV:
x4
DIV:
=2:4(V)x
Time
/
Time:Number
MEAST,RENIENT
DIV
/
\
--r
Fig.
4 volts
8 volts
:
2.828
(second)
value
VARIABLEs
4Drv
1
2
volts
of
DIVs
of SWEEP
(b)
for I
@,
cycle
TIME
and SWEEP TLME
@
VOLT
SWEEP
DIV......
/
TIME
x
DIV
/
at 2V
DIV...... at
/
DIV VARIABLE
/
5msec
Frequency:
3.12.(21DC
AC-GND-DC
set
the switchto
place
as
volt
O
After
that,
turn the switch
DC
voltage
When
the
trace line
5msec
50 Hz
The
attenuation,
10.
by
VOLTAGE
being
at AC
GND and
reference.
:
Shilt
shifts
(DIV)
X
4
input of
pull
this oscilloscope
the irnpedance
MEASUREMENT
position,
only AC or AC
TRIGGERING
the
to DC. Then
(DIV)
up-ward,
x
the
VOLTS
polarity
20m
sec
becomes lOM
the trace line
DIV
/
(
is
f
is lMg
component
LEVEL
shifts
and
),
-9
shunted by 20pF
shunted
O
knob@for
up
or down.
down-ward
was
by l5pF.
displayed
atrace
The value
(
is
capacitance.
Then
line,
-).
Whenthe
the voltage reading
on
the CRT screen.
which must
of movement
probe
is
must
be multiplied
For DC
positioned
be
is
the DC voltage.
Measurement,
usedin l0: 1
at a@rtain
SECTION
3
OPERATION
3.12.(3),dM MODI.LATION
There are
when
3.12-1
MODE switch
Then,
3-I2-(5)
(EX)
various
carrier
the
4I
DUAL.TRACE
comparison
LB\tsL COMPARISON
OUTPUT
ways of
frequency
beingturnedto
of two
INPUT
/
measurements,
withinthe
is
APPLICATIONS
relative
an
of
MEASLREMENT
herein
but
frequency
Fig.2
Channel
signals
amPlifier
both
are
easily
DUAL,
manual
this
bandwidth
A and
compared
of
_1
I
the
B
such
Channel
envelope
the
oscilloscope.
B
as 1evel,
waveforms,
methodis
See Fig. 2
Mod.
works
introduced'This
(%):
AB
A+ts
-)
simultaneously.
phase,
etc.
method
100
is applicable
With the
place
of the
If the
connections
CH-B
amplifier.
two signals
amptifier.
viewing only
waveform
do not
simply turn
Then,
distortion.
Fig.
the
of
CH-B).
onto
match
rhe
When thereis
Set the
3,
each other
MODE
displays
Thenthe
even
switch
nodistortion originated
of
difference
variable
ADD
to
OUTPUT
3
Fig.
putl
in
CH-B
adjusted,
are
the
amplifier,
the
CH-A and
betweenredings
controls
and
same
the
of CH-A
the difference
position
CH-B
a straighttrace
t
(POSITION
VOLTS
knod
/
is the
for
line is
zaTa-j
controls
and CH-B's
DIY
distortion
invert
displayedinSUB
could be
(SUB
adjusted
is
the
caused in the
MODE),
MODE
to
gain
for
-
l0-
SECTION
3
OPERATION
3.12.{.6l.
Every stereo equipment has
So,
}rz-l7lTv
Triggered
(line)
SYNC
}12.(8I
The most
and sync
pul
REPAIRING STEREO SYSTEMS
two
simultaneous comparison of the same
SERVTCTNG
oscilloscope is indispensable.
for accurate
PULSES.
COMPOSITE
important waveform
pulses.
ses.
synchronization to
VIDEO ANALYSIS
4
Fig
and Fig.
symmetrical amplifier
stages
This model
view VIDEO
circuits.
it so easy
makes
has the very convenient TV
SIGNAL, BLANKING PEDESTALS,
in TV servicing is the composite
5 shows composite signals
VIDEO
synchronized with
Fig.4
to locate
signal
defective
consisting
horizontal
Fig. 5
point.
SYNC
of the
circuits
video signal,
sync
TV-V(Frame) and TV-H
of
and Vertical
VITS
pulses
Horizontal
/
blanking
the
and vertical blanking
pedestals,
HORI
SYNC
AL
PULSE BLANKING
PULSE
-
ll
VERTICAL
SYNC
PULSE
VERTICAI.
BLANKINi
-
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